[neonixie-l] Re: Help required on nixie power supply

I would try something between 10 and 200pf (0.01 and 0.2 nf). Anything more will maybe cause another problem. About the output cap, check its ESR, it will affect the overall performance. Also check if all solder-joints are in good quality. -- You received this message because you are subscrib

[neonixie-l] Re: Help required on nixie power supply

Can you post a schematic ? I'm a bit concerned about the 250V-rated MOSFET, when you mentioned ~300V was measured. Is the MOSFET exposed to this voltage, or is there a doubler/tripler ? My first guess is the supply is *under*-loaded, because the feedback mechanism is basically doing it job.

Re: [neonixie-l] Help required on nixie power supply

> If I ground the FB pin, instead of seeing 12V at the output as expected I see > something like 300-310V. The input to the FB pin is proportional to the output voltage. If you ground it, it will see the output voltage as "too low" and try to raise it, giving the result you observed. - John

[neonixie-l] Help required on nixie power supply

Can we see whole layout please? Nick (de Smith) -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, se

[neonixie-l] Billington Export 2

Going back though previous posts I came across this one by Paul Parry - Billington Export - the link he gave in the thread has led to me locating 20 x CV5278 by Mullard and hopefully they accept my offer on them. I like these tubes as they are idea

Re: [neonixie-l] Re: IN-18 Typical Failure Mechanism

Hi Jeff, I dont think there is a simple solution to protect the pins from corrosion. Even the air humidity can develop leaks in the seals with time. I know that JJ vacuum tube manufacturer uses gold coating on pins of some of their tubes to prevent corrosion (I dont know if it has actually any eff